If scientists ever find a way for us to live forever, then we'll live through plenty of technological advancement. Eventually we'll have fully immersive virtual reality where we'll be able to visit any period from history or live in a world that we create to be whatever we want, not to mention having the ability to travel the universe.
And there are even some people who believe we will merge with artificial intelligence and become transhuman. If such a thing occurs, then presumably our whole way of thinking will be different. It may be impossible to imagine just what we could conceive of in that state.
I think I would want to live forever given all of the possibilities, but I'm not sure if science will ever save us from aging, much less in my lifetime.